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Meshtastic

Linux

Raspberry Pi Zero 2W / Pi 3B

Kernel configuration

dtparam=spi=on
dtoverlay=spi0-0cs
enable_uart=1

Kernel command line

console=tty1 root=PARTUUID=xxxxxxxx-02 rootfstype=ext4 fsck.repair=yes rootwait cfg80211.ieee80211_regdom=GB

Meshtastic

Lora:
  Module: sx1262  # Waveshare SX126X XXXM
  DIO2_AS_RF_SWITCH: true
  CS: 21
  IRQ: 16
  Busy: 20
  Reset: 18
  
GPS:
  SerialPath: /dev/ttyS0
  
Logging:
  LogLevel: debug # debug, info, warn, error

Webserver:
  Port: 443 # Port for Webserver & Webservices
  RootPath: /usr/share/doc/meshtasticd/web # Root Dir of WebServer

Systemd

systemctl enable meshtasticd
systemctl start meshtasticd

Command Line Interface

apt install python3-full
mkdir -p ~/.venvs
python3 -m venv ~/.venvs/meshtastic
~/.venvs/meshtastic/bin/python -m pip install pytap2
~/.venvs/meshtastic/bin/python -m pip install meshtastic

Add ~/.venvs/meshtastic/bin to $PATH

meshtastic --port /dev/ttyACM2 --set lora.region EU_868
meshtastic --port /dev/ttyACM2 --noprot

Channel

meshtastic --port /dev/ttyACM2 --ch-set name "XXX" --ch-index 1
Connected to radio
Set name to HOME
Writing modified channels to device

meshtastic --port /dev/ttyACM2 --ch-set psk base64:xxx --ch-index 1 
Connected to radio
Writing modified channels to device

Messages

This setup sends and receives messages on the CLI on a Pi Pico attached to /dev/ttyACM2

Receive

Install

git clone https://github.com/brad28b/meshtastic-cli-receive-text
cd meshtastic-cli-receive-text
~/.venvs/meshtastic/bin/python -m pip install -r requirements.txt

Prepend the following the each python script and edit the IP address and/or serial port in each script.

#! /bin/bash
"exec" "`dirname $0`/python" "$0" "$@"

Copy scripts into the venv.

chmod +x *.py
cp *.py ~/.venvs/meshtastic/bin

Listen

read_messages_serial.py
Using serial port: /dev/ttyACM2
Initializing SerialInterface to get node info...
Node info retrieved.
Parsing node info...
Node info parsed.
Node List:
{'num': '!0342a02e', 'user': {'shortName': 'Pico'}}
{'num': '!014fdb61', 'user': {'shortName': 'RPi'}}
Subscribed to meshtastic.receive
SerialInterface setup for listening.
RPi: Hello World!
Send

Direct message

meshtastic --port /dev/ttyACM2 --dest \!014fdb61 --sendtext "Hi!"

Channel message

meshtastic --port /dev/ttyACM2 --ch-index 1 --sendtext "Hello!"

Info

These are some parameters which can be used to sniff the LoRa radio with RTL-SDR.

region=EU_868, name=LongFast

freqEnd: 869.4000.250000 MHz

numChannels: 1 x 250.000kHz

Radio frequency: 869.525024

Resources

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